Question about 1999 Ford Taurus

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The heat system is broken

I own a ford Taurus 1999 i already put over two grand on this car now something is wrong with my heating system i took it to three different shop only for them to keep telling me it is something else wrong,I got my tune up in oil change, they change my water pump which the old one was terrible, they change the themostrate in the car. I mean with else can be wrong, the check engine light was on the guy said he erased that. but please tell me what can possible be wrong with this car.

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Hi,

You haven't said what is actually wrong with the heat system (there can be several different failures). For the time being I'll assume the fan blows plenty of air but the air is always cool/cold regardless of where the heat temperature selector is positioned.

The most common cause on these cars is a plugged heater core. With the engine at normal operating temperature, feel the heater core hoses (under-hood, mid/lower portion of firewall, access from passengers side). They should both be very warm. If not expect blockage in the heater core.

While a replacement heater core along with a good cooling system flush is the ultimate cure, reverse flushing the heater core will restore heat. This can be accomplished with a garden hose. Disconnect both heater core hoses (not with the engine hot as the coolant get very hot!!) and connect a garden hose. Turn on the water supply to flush the core. Flush the core in both directions (by hooking the hose to one side of the heater core and letting the water run, then disconnecting and connecting to other side of the heater core...). An old garden hose with end cut will work fine if your existing hose will not fit over the pipe (plumb it together anyway you can).

The heater core sits rather low in the cooling system. This means crud in the system will settle there eventually causing blockage. If you flush the core the crud will eventually cause blockage again. Reflushing will work over and over again if saving money is the primary goal.

If this is not the problem, the blend air door is probably not working.

Reply and we'll continue. I don't want to repeat things that have already been done, as $2000 should of covered both things I have mentioned.

Posted on Nov 19, 2008

  • jesse777 Nov 20, 2008

    Hi,



    You have rated the answer but not replied. I'll stick with you until your heater is fixed if you respond letting me know what you tried so far. If you need information on the blend air door, I'll need to send instructions via email.

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